Maxwell Digital Multimeters 25910, User Manual

User Manual

EN

Pressing the MODE button cycles through the 

available modes according to the below figure:

°C/°F, Lock On / Off  and Alarm switch 

1.  °C/°F

2.  Lock On/Off

3.  Alarm

• 

Select the temperature unit for the 

measurement (°C or °F) with the °C/°F switch.

• 

To close the battery cover and continue 

measuring slide the middle Lock On/Off switch 

to the right.

• 

If you pull the trigger with the battery cover 

closed the laser and backlight activates. To 

activate the alarm, slide the Set Alarm button 

to the right.

• 

To select the high and low alarm values and 

emissivity you need to activate the display 

with the pull of the trigger or press of the 

MODE button, then press the MODE button 

until the proper code appears in the lower 

right corner and set the desired values with 

the up and down buttons.

M

easUring

principle

The device detects the infrared beams that an 

object emits. The device focuses the infrared 

energy of the object through a lentil into a 

sensor, converts the surface temperature 

into electronic signals and a microcomputer 

calculates and displays the temperature on the 

LCD screen. The device can measure the surface 

temperature of an object without direct contact. 

Aim the laser on the measured object only!

M

easUring

MetHod

• 

To measure the temperature of an object point 

the device to the object and pull the trigger. 

Continuous measurement is possible with 

holding the trigger. The LCD display shows the 

measured value even if the trigger is released. 

Approximately 7 seconds after the trigger is 

released, the device turns off. 

• 

If the object is far from the device you can turn 

on the laser pointer to help aiming.

• 

For nighttime measurement turn on the 

backlight.

• 

Select the °C or °F unit with the °C/°F button.

d:s 

ratio

The device has a vision angle and a spot size, as 

described on the below figure:

Object      Focus pipe   Sensor

Make sure that the object is larger than the 

spot size of the unit. To reduce this you need to 

move closer to the object. The ratio between the 

distance and the spot is 16:1, as shown on the 

below figure: